linux-ext4 - Re: Ordered mode rewrite patch

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Date:	Tue, 8 Apr 2008 23:16:41 +0200
From:	Jan Kara <jack@...e.cz>
To:	Nathan Grennan <jack@...nusx-1.org>
Cc:	Marcelo Tosatti <mtosatti@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: Ordered mode rewrite patch

On Tue 08-04-08 13:12:20, Nathan Grennan wrote:
> Jan Kara wrote:
>>   Hello,
>>
>>   attached is a jumbo patch that reverses locking order of transaction
>> start and page lock in ext3 and rewrites handling of ordered data mode in
>> JBD and ext3. Note that the patch will break compilation of ext4 and 
>> OCFS2.
>> The patch survives LTP run on my test machine so it shouldn't eat your 
>> data
>> immediately but bugs are of course possible...
>>   I'm very interested in any results (both positive and negative) you 
>> could
>> get with it :). Thanks for testing it.
>>
>> 									Honza
>>
>> PS: CCing also linux-ext4 list in case there are some other interested
>> testers. Next on my todo list is to port this for ext4...
>>   
> I am trying to apply the patch to Fedora 8's kernel-2.6.24.4-64, and it 
> fails on all the files.
>
> + '[' '!' -f 
> /home/builder/rpmbuild/SOURCES/kernel-2.6.24.4/ext3-jbd-2.6.25-ordered_mode.patch 
> ']'
> + case "$patch" in
> + patch -p1 -F1 -s
> 1 out of 26 hunks FAILED -- saving rejects to file fs/ext3/inode.c.rej
> 1 out of 11 hunks FAILED -- saving rejects to file fs/jbd/commit.c.rej
> 1 out of 12 hunks FAILED -- saving rejects to file fs/jbd/transaction.c.rej
> 1 out of 1 hunk FAILED -- saving rejects to file 
> include/linux/writeback.h.rej
  Hmm, strange so many chunks failed but anyway, the patch is against
recent Linus's git - I think 2.6.25-rc7 will do just fine.

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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